Not all shadows are black. Red, green, and blue lights shine on this wall, combining to make white. As you move in front of the wall, your body can block one, two, or all three of the lights, resulting in shadows of various colors.

XTech at the Exploratorium empowers high school students through the practical use of Science, Technology, Engineering, Art, and Mathematics. Students develop skills - designing and building, creating media, and facilitating community education events - that will lead them into college and beyond.
In this show, we will be investigating color. There are colors all around us. Join us and explore the relationship between color and light. Watch as we create colored shadows and trick your mind with colors.

A year and a half after entering Saturn's orbit, the Cassini spacecraft continued to gather exciting new information. Dr. Paul Doherty and Dr. Eric Weygren bring us up to date on the Cassini Mission and show stunning images of Saturn and its ever-growing assortment of moons.

On Thursday, June 21, 2001, a total solar eclipse sped across the Southern Hemisphere. The shadow of the moon first darkened the South Atlantic about 250 miles east of the Uruguay coast. It crossed the Atlantic Ocean, traversed southern Africa and the island of Madagascar, and then vanished into the darkness as night fell over the Indian Ocean. We sent our crew to the country of Zambia to bring images of the total solar eclipse as it happened.

Dr. Paul Doherty scours the globe for the world's greatest science demonstrations. Here he partners with Dr. Gorazd Planinsic, frequent contributor to Physics Teacher magazine, active in international physics education, and illustrator of physics text books. Watch this webcast, follow the links to the 'recipes,' then try it yourself!

Webcasts made possible through
the generosity of the Gordon and Betty Moore Foundation, The Jim Clark
Endowment for Internet Education, the McBean Family Foundation,.and the Corporation for Educational Networks Initiatives in California (CENIC).